<template>
	<view>
		<view class="search-box">
			<uni-search-bar :radius="100" :cancelButton="none" @input="input" ></uni-search-bar>
		</view>
		<view class="sugg-list" v-if="searchResults.length !== 0">
			<view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item)">
				<view class="goods-name">{{item.goods_name}}</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view> 
		<view class="history-box" v-else>
			<!-- 标题区域 -->
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons type="trash" size="17" @click="clean"></uni-icons>
			</view>
			<!-- 列表区域 -->
			<view class="history-list">
				<uni-tag inverted="true" type="success" :text="item" v-for="(item,i) in histories" :key="i" @click="gotoGoodsList(item)"></uni-tag>
			</view>
		</view>
	</view>
</template>
 
<script>
	export default {
		data() {
			return {
				timer:null,
				kw:'',
				//搜索的结果列表
				searchResults:[],
				// 搜索关键词的历史记录
				historyList: []
			};
		},
		onLoad() {
			this.historyList = JSON.parse(uni.getStorageSync('kw')|| '[]')
		},
		methods:{
			//input输入事件
			input(e){
				clearInterval(this.timer)
				this.timer = setTimeout(()=>{
					this.kw = e.value
					this.getSearchList()
				},500)
			},
			async getSearchList(){
				//判断搜索关键词是够为空
				if(this.kw.length ===0){
					this.searchResults = []
					return
				}
				const {data : res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
				if(res.meta.status !== 200) return uni.$showMsg()
				this.searchResults = res.message
				this.saveSearchHistory();
			},
			gotoDetail(item){
				uni.navigateTo({
					url:'/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
				})
			},
			saveSearchHistory(){ 
				this.historyList.push(this.kw);
				const set =new Set(this.historyList);
				set.delete(this.kw);
				set.add(this.kw);
				this.historyList= Array.from(set);
				//对搜索历史数据,进行持久化本地存储
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			},
			clean(){
				this.historyList = [];
				uni.setStorageSync('kw','[]')
			},
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?query='+item
				})
			}
		},
		computed:{
			histories(){
				return [...this.historyList].reverse()			}
		}
		
	}
</script>

<style lang="scss">
.search-box{
	position: sticky;
	top: 0;
	z-index: 999;
}
.sugg-list{
	padding: 0 5px;
	.sugg-item{
		display: flex;
		align-items: center;
		justify-content: space-between;
		font-size: 12px;
		padding: 13px 0;
		border-bottom: 1px solid #efefef;
		.goods-name{
			// 文字不允许换行
			white-space: nowrap;
			//超出部分隐藏
			overflow: hidden;
			//文本超出后,使用...代替
			text-overflow: ellipsis;
		}
	}
}
.history-box{
	padding: 0 5px;
	.history-title{
		display: flex;
		justify-content: space-between;
		height: 40px;
		align-items: center;
		font-size: 13px;
		border-bottom: 1px solid #efefef;
	}
	.history-list{
		display: flex;
		flex-wrap: wrap;
		.uni-tag{
			margin: 5px 5px 0 0;
		}
	}
}
</style>
